Grate.



PATENTEDSEPT. 18,1906.

G. M. M'ULLEN.

GRATB.

APPLIOATIQN FILED JAN. 12. 1906.

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/7' 88/58: ,lNVENTOH GREGORY M.MULLELN THE NORRIS PETERS ca WASHINGTON, o. c.

' No. 831,368. PATENTED SEPT. 18, 1906.

G. M. MULLEN.

GRATE.

APPLIOATION FILED JAN. 12, 1906.

2 SHEETS-SHEET 2.

lNVEN7'0l-7 GREGQRY M. M ULLEN THE NORRIS PETERS cm. wAsl-mvamu, u c.

GBEGORY M. MULLEN, OF BALTIMORE, MARYLAND.

GRATE.

Specification of Letters Patent.

Patented Sept. 18, 1906.

Application filed January 12,1906. Serial No. 295,723.

To all 7071,0711, it may concern:

Be it known that I, GREGORY M. MULLEN, a citizen of the United. States, and a resident of Baltimore, in the State of Maryland, have made certain new and useful Improvements in Grates, of which the following is a specification.

My invention is an improvement in grates; and it consists in certain novel constructions and combinations of parts, as will be hereinafter described and claimed.

In the drawings, Figure 1 is a top plan view of a grate embodying my invention. Fig. 2 is a sectional elevation on about line 2 2 of Fig. 1. Fig. 3 is a cross-section on about line 3 3 of Fig. 1. Fig. 4 is a detail cross-section on about line 4 4 of Fig. 1. Fig. 5 is a detail perspective view of one of the grate sections. Figs. 6 and 7 are detail perspec tive views, respectively, of the outer and inner sections of the ends of the grate-frame; and Fig. 8 is a detail side View of the gratesection having the depending crank-arm. Fig. 9 is a detail perspective view of the outer side of the rocker-arm, showing the trunnion bearing and the crank-arm; and Fig. 10 is a similar view of the outer side of the trunnionbearing section at the end of the grate opposite the rocker-arm.

The ends of the grate-frame form bearingbars for the grates, and these bearing-bars are preferably constructed in sections, as illustrated in Figs. 1, 4, 6, and 7, so formed as to provide proper bearings for the grates and also to permit the desired ventilation or passage of air in order to cool the bearing-bars and prevent injury thereto from overheating. The bearing-bars, as shown, are composed of the outer sections or plates A and the inner sections or plates B. The inner section B is provided in its upper side with recesses B, whose base-walls B are rounded and form half-round bearings in which rest the trunnions of the grates. The outer section A is provided on its inner face with the upright recesses A, forming channels for the passage of air, is rabbeted at A to receive the upright portions B of the section B, and has the inwardly projecting bosses or portions A which fit within the upper ends of the recesses B of the section B, the lower edge of the section A being provided at A with the curved recesses, which when the parts A and B are connected are concentric with the halfround base-walls B of the recesses B and complete the bearings for the trunnions of the grates. The sections A and B are bolted together by the bolts C passing through the holes a and b and when so united furnish a strong bearing-support for the grates, having the upright channels for the passage of air to aid in cooling the bearing-bars, as will be understood from the drawings and the previous description.

The grates comprise the shaft D, the sections E, applied to said shaft and removable therefrom, and the yoke-bolts F for securing the sections E removably on the shaft D, to n gether with the rocker-sections G, having depending crank-arms II, to which the shakingbar I is connected, as best shown in Fig. 3, in the use of the invention. The shaft D is preferably a bar of wrought-iron or other suitable metal, non-circular in cross-section and usually square, as will be understood from Figs. 2 and 3.

The sections E, of which I may employ two, three, or more for each shaft D, are formed on their upper edges to afford a suitable grate-surface and are provided in theirlower edges with recesses E, conforming to the shaft D and adapted to fit down thereover, so they can be readily applied to and removed from the shaft, as will be understood from Fig. 3. In securing the sections E upon the shaft I provide the yoke-bolts F, which fit over the body portion 0 of the sections E between the top plates thereof and extend down on opposite sides of said body portion to a point below the shaft D and are secured below the shaft D, preferably by means of the cross-plate F and the nuts F arranged and operating as shown in Fig. 3, in which the arms of the yoke-bolt F extend through openings in the plate F and receive the nuts F below the said plate, as shown. By this construction I am able to obtain a secure fastening of the grate-sections upon the shaft, which fastening may be renewed at any time without renewing the grate-sections, being entirely independent of the grate-sections, so that no matter to what eXent the gratesections may be burned away they may be readily secured by means of the yokebolts,which latter can be renewed at small cost whenever desired.

The end sections of the grate are provided with the round tubular portions 1, which turn in the bearings B A of the bearing-bars and can be renewed whenever desired.

The invention will be found especially useful in furnaces where the grates burn out I claim as new, and desire to secure by Letters Patent, is

1. The combination in a grate, with a shaft or bar, of a plurality of separate and independent gratesections having body portions, and grate bars or plates above the same, and providedin their lower edges with slots or recesses coinciding with the shaft, and receiving the same, the grate-sections fitting on said shaft from above and abutting end to end and yoke-bolts fitting over the body portions of the sections below the upper surfaces of the bars thereof and having their arms eX- tending thence downwardly below the shaft, and cross-plates and nuts securing the yokebolts below the shaft, substantially as set forth.

2. The combination in a-grate, of ashaft or bar, a series of separate grate-sections independent of eachother and constructed with body portions and grate-bars above the same, the body-sections extending'along the shaft laterally of the bars, andsaid body portions having in their lower sides slots or recesses receiving the shaft, and yoke-bolts fitting over the body portions of the sections alongside and below the upper surfaces of the bars in described, with the grates having trunnions, of the bearing-bars for said grates, composed of sections fitting side by side and united together, the said sections being provided with the curved recesses combining to form bearings for the grate-trunnions and one of said sections having the channels forming passages for air whereby to cool the bearing bars, substantially as set forth.

4. A bearing-bar for grates composed of sections fitting side by side, one of the sections being provided with upright channels for the passage of air, with rabbets at the edges of said channels and with inwardlyprojecting lugs or bosses between the channels, and the other section having recesses or slots in its upper edge receiving the inwardly-projecting bosses of the first section, the base-walls of said slots being rounded and the lower edge of the first section having in its lower edge curved recesses coinciding with the said base-walls in forming a bearing for the grate-trunnions, all substantially as and for the purposes set forth.

5. The combination with the grates, of the bearing-bar composed of inner and outer sections recessed to form bearings and provided in the inner face of one of the sections with channels forming air-passages, substantially as set forth,

GREGORY M. MULLEN.

I/Vitnesses:

M. H. PLUNKETT, J. KENNETH MULLEN. 

